When a Florida man suffered a heart attack, he needed to leave his job. Between everyday expenses and medical bills, he fell behind on his mortgage and other bills, and debt collectors began calling. And calling. And calling. Eventually, a lawsuit alleges, the stress from the harassing and abusive phone calls led to the man’s death. Frivolous lawsuit? Maybe not.

The Florida law firm Morgan and Morgan is looking to sue collection agencies that have made consumers’ lives…